Accessing Internet through Proxy Server

[Sajid Niazi]

When I access internet through my java application from my home i.e. no proxy server, then I am able to get access to it.
But when I try to access internet from my office where there is a proxy server, I get a unkownhostexception and none of the java applications making using of java.net package execute.
Please help me find out the solution to this problem.
// sample code
import java.net.*;
import java.io.*;
public class SourceViewer
{
public static void main(String args[])
{
URL url;
try{
if (args.length > 0)
url = new URL(args[0]);
else
url = new URL("http://www.microsoft.com");
URLConnection uc = url.openConnection();
InputStream raw = uc.getInputStream();
InputStream buffer = new BufferedInputStream (raw);

Reader r = new InputStreamReader(buffer);
int c;
while ((c = r.read()) != -1)
{
System.out.print((char) c);
}
}
catch(MalformedURLException e)
{
System.err.println("Invalid URL");
}
catch(IOException e)
{
System.err.println(e);
}


}// main

}// class SView

[Dan Richardson]

Try out the following code. Replace the your_proxy stuff with your actual proxy server and port and proxy login and password. Hope this helps.

  

// sample code
import java.util.*;
import java.net.*;
import java.io.*;
public class SourceViewer
{
public static void main(String args[])
{
URL url;
try{
if (args.length > 0)
url = new URL(args[0]);
else 
url = new URL("http://www.microsoft.com");
Properties properties = System.getProperties();
properties.put("http.proxyHost", "your_proxy_server");
properties.put("http.proxyPort", "your_proxy_port");

HttpURLConnection uc = (HttpURLConnection)url.openConnection();
String login = "your_proxy_login:your_proxy_password";
String encodedLogin = new sun.misc.BASE64Encoder().encodeBuffer(login.getBytes());
uc.setRequestProperty("Proxy-Authorization", "Basic " + encodedLogin);
InputStream buffer = uc.getInputStream();

Reader r = new InputStreamReader(buffer);
int c;
while ((c = r.read()) != -1)
{
System.out.print((char) c);
}
}
catch(MalformedURLException e)
{
System.err.println("Invalid URL");
}
catch(IOException e)
{
System.err.println(e);
}

}// main
}// class SView 
 

[Sajid Niazi]

Hi,
Thanx Dan Richardson. Your solution worked for me.
It even worked when I commented out the code that deals with username and password. Probably 'coz I had access to internet when I used a browser(setting proxies in browser).
Again a lot of thanx for helping me.
Regards
sajid niazi
[ August 17, 2002: Message edited by: Sajid Niazi ]